and there’s sonic toothbrushes that have vibrating brush heads that move the bristles side to side at really high speeds, sometimes up to frequencies of 50,000 movements per minute,” says Dr.
I rated the Oral-B Pro 3 the best electric toothbrush in my round-up, thanks to its low price and effective cleaning power. The brush is noisier than the premium iO range but cleans just as well.